Margolis R H, Goycoolea H G
Department of Otolaryngology, University of Minnesota.
Ear Hear. 1993 Dec;14(6):408-13. doi: 10.1097/00003446-199312000-00006.
Multifrequency tympanograms were recorded from 56 ears of 28 normal-hearing adult subjects to obtain normative data and to determine abnormal criteria for tympanometric measures. Static admittance, tympanometric width, and tympanometric peak pressure at 226 Hz were analyzed along with eight different estimates of the resonant frequency of the middle ear. Based on test-retest reliability and normal distribution characteristics, preferred methods for clinical estimation of resonant frequency were determined. The sweep pressure mode (ear canal pressure is swept while probe frequency is held constant) is preferred for detection of abnormally high resonant frequencies. The sweep frequency mode (probe frequency is swept while ear canal air pressure is held constant) is preferred for identification of abnormally low resonant frequencies. Compensation for ear canal volume at +200 daPa was preferred over other compensation methods for estimation of middle ear resonant frequency.
对28名听力正常的成年受试者的56只耳朵进行了多频鼓室图记录，以获取正常数据并确定鼓室测量的异常标准。分析了226Hz时的静态导纳、鼓室宽度和鼓室峰压，以及中耳共振频率的八种不同估计值。基于重测信度和正态分布特征，确定了临床估计共振频率的首选方法。扫频压力模式（在探头频率保持恒定的同时耳道压力被扫描）对于检测异常高的共振频率是首选。扫频模式（在耳道气压保持恒定的同时探头频率被扫描）对于识别异常低的共振频率是首选。在估计中耳共振频率时，+200 daPa时的耳道容积补偿比其他补偿方法更可取。
